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Date:: Fri Apr 15 15:34:35 2022 UTC
Message:: don't insert current candidate in eecmd_select after the recent 'must select' thing there's no need to call minibuffer_insert_current_candidate from eecmd_select anymore.
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1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 
23 #include "minibuffer.h"
24 #include "session.h"
25 #include "ui.h"
26 #include "utf8.h"
27 #include "utils.h"
28 
29 #define nitems(x) (sizeof(x)/sizeof(x[0]))
30 
31 static void		*minibuffer_metadata(void);
32 static const char	*minibuffer_compl_text(void);
33 static void		 minibuffer_hist_save_entry(void);
34 static void		 yornp_self_insert(void);
35 static void		 yornp_abort(void);
36 static void		 read_self_insert(void);
37 static void		 read_abort(void);
38 static void		 read_select(void);
39 static void		 handle_clear_echoarea(int, short, void *);
40 
41 static struct event	clechoev;
42 static struct timeval	clechoev_timer = { 5, 0 };
43 
44 static void (*yornp_cb)(int, struct tab *);
45 static struct tab *yornp_data;
46 
47 static void (*read_cb)(const char*, struct tab *);
48 static struct tab *read_data;
49 
50 /* XXX: don't forget to init these in minibuffer_init */
51 struct histhead eecmd_history,
52 	ir_history,
53 	lu_history,
54 	read_history;
55 
56 struct ministate ministate;
57 
58 struct buffer minibufferwin;
59 
60 int in_minibuffer;
61 
62 static inline int
63 matches(char **words, size_t len, struct line *l)
64 {
65 	size_t	i;
66 	int	lm, am;
67 
68 	for (i = 0; i < len; ++i) {
69 		lm = am = 0;
70 
71 		if (strcasestr(l->line, words[i]) != NULL)
72 			lm = 1;
73 		if (l->alt != NULL &&
74 		    strcasestr(l->alt, words[i]) != NULL)
75 			am = 1;
76 
77 		if (!lm && !am)
78 			return 0;
79 	}
80 
81 	return 1;
82 }
83 
84 /*
85  * Recompute the visible completions.  If add is 1, don't consider the
86  * ones already hidden.
87  */
88 void
89 recompute_completions(int add)
90 {
91 	static char	 buf[GEMINI_URL_LEN];
92 	char		*input, **ap, *words[10];
93 	size_t		 len = 0;
94 	struct line	*l;
95 	struct vline	*vl;
96 	struct buffer	*b;
97 
98 	if (in_minibuffer != MB_COMPREAD)
99 		return;
100 
101 	strlcpy(buf, ministate.buf, sizeof(buf));
102 	input = buf;
103 
104 	/* tokenize the input */
105 	for (ap = words; ap < words + nitems(words) &&
106 	    (*ap = strsep(&input, " ")) != NULL;) {
107 		if (**ap != '\0')
108 			ap++, len++;
109 	}
110 
111 	b = &ministate.compl.buffer;
112 	TAILQ_FOREACH(l, &b->page.head, lines) {
113 		l->type = LINE_COMPL;
114 		if (add && l->flags & L_HIDDEN)
115 			continue;
116 		if (matches(words, len, l)) {
117 			if (l->flags & L_HIDDEN)
118 				b->line_max++;
119 			l->flags &= ~L_HIDDEN;
120 		} else {
121 			if (!(l->flags & L_HIDDEN))
122 				b->line_max--;
123 			l->flags |= L_HIDDEN;
124 		}
125 	}
126 
127 	if (b->current_line == NULL)
128 		b->current_line = TAILQ_FIRST(&b->head);
129 	b->current_line = adjust_line(b->current_line, b);
130 	vl = b->current_line;
131 	if (ministate.compl.must_select && vl != NULL)
132 		vl->parent->type = LINE_COMPL_CURRENT;
133 }
134 
135 int
136 minibuffer_insert_current_candidate(void)
137 {
138 	struct vline *vl;
139 
140 	vl = ministate.compl.buffer.current_line;
141 	if (vl == NULL || vl->parent->flags & L_HIDDEN)
142 		return -1;
143 
144 	minibuffer_taint_hist();
145 	strlcpy(ministate.buf, vl->parent->line, sizeof(ministate.buf));
146 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
147 
148 	return 0;
149 }
150 
151 static void *
152 minibuffer_metadata(void)
153 {
154 	struct vline	*vl;
155 
156 	vl = ministate.compl.buffer.current_line;
157 
158 	if (vl == NULL || vl->parent->flags & L_HIDDEN)
159 		return NULL;
160 
161 	return vl->parent->data;
162 }
163 
164 static const char *
165 minibuffer_compl_text(void)
166 {
167 	struct vline	*vl;
168 
169 	vl = ministate.compl.buffer.current_line;
170 	if (vl == NULL || vl->parent->flags & L_HIDDEN ||
171 	    vl->parent->type == LINE_COMPL || vl->parent->line == NULL)
172 		return ministate.buf;
173 	return vl->parent->line;
174 }
175 
176 static void
177 minibuffer_hist_save_entry(void)
178 {
179 	struct hist	*hist;
180 	const char	*t;
181 
182 	if (ministate.history == NULL)
183 		return;
184 
185 	if ((hist = calloc(1, sizeof(*hist))) == NULL)
186 		abort();
187 
188 	t = minibuffer_compl_text();
189 	strlcpy(hist->h, t, sizeof(hist->h));
190 
191 	TAILQ_INSERT_TAIL(&ministate.history->head, hist, entries);
192 	ministate.history->len++;
193 }
194 
195 /*
196  * taint the minibuffer cache: if we're currently showing a history
197  * element, copy that to the current buf and reset the "history
198  * navigation" thing.
199  */
200 void
201 minibuffer_taint_hist(void)
202 {
203 	if (ministate.hist_cur == NULL)
204 		return;
205 
206 	strlcpy(ministate.buf, ministate.hist_cur->h, sizeof(ministate.buf));
207 	ministate.hist_cur = NULL;
208 	ministate.buffer.current_line->line = ministate.buf;
209 }
210 
211 void
212 minibuffer_self_insert(void)
213 {
214 	char	*c, tmp[5] = {0};
215 	size_t	len;
216 
217 	minibuffer_taint_hist();
218 
219 	if (thiskey.cp == 0)
220 		return;
221 
222 	len = utf8_encode(thiskey.cp, tmp);
223 	c = utf8_nth(ministate.buffer.current_line->line, ministate.buffer.cpoff);
224 	if (c + len > ministate.buf + sizeof(ministate.buf) - 1)
225 		return;
226 
227 	memmove(c + len, c, strlen(c)+1);
228 	memcpy(c, tmp, len);
229 	ministate.buffer.cpoff++;
230 
231 	recompute_completions(1);
232 }
233 
234 void
235 sensible_self_insert(void)
236 {
237 	if (thiskey.meta ||
238 	    (!unicode_isgraph(thiskey.key) && thiskey.key != ' ')) {
239 		global_key_unbound();
240 		return;
241 	}
242 
243 	minibuffer_self_insert();
244 }
245 
246 void
247 eecmd_select(void)
248 {
249 	struct cmd	*cmd;
250 	const char	*t;
251 
252 	t = minibuffer_compl_text();
253 	for (cmd = cmds; cmd->cmd != NULL; ++cmd) {
254 		if (!strcmp(cmd->cmd, t)) {
255 			minibuffer_hist_save_entry();
256 			exit_minibuffer();
257 			cmd->fn(current_buffer());
258 			return;
259 		}
260 	}
261 
262 	message("No match");
263 }
264 
265 void
266 ir_select_gemini(void)
267 {
268 	char		 buf[1025] = {0};
269 	struct phos_uri	 uri;
270 	struct tab	*tab = current_tab;
271 
272 	minibuffer_hist_save_entry();
273 
274 	/* a bit ugly but... */
275 	memcpy(&uri, &tab->uri, sizeof(tab->uri));
276 	phos_uri_set_query(&uri, minibuffer_compl_text());
277 	phos_serialize_uri(&uri, buf, sizeof(buf));
278 
279 	exit_minibuffer();
280 	load_url_in_tab(tab, buf, NULL, LU_MODE_NOCACHE);
281 }
282 
283 void
284 ir_select_reply(void)
285 {
286 	char		 buf[1025] = {0};
287 	struct phos_uri	 uri;
288 	struct tab	*tab = current_tab;
289 
290 	minibuffer_hist_save_entry();
291 
292 	/* a bit ugly but... */
293 	strlcpy(buf, tab->last_input_url, sizeof(buf));
294 	phos_parse_absolute_uri(buf, &uri);
295 	phos_uri_set_query(&uri, minibuffer_compl_text());
296 	phos_serialize_uri(&uri, buf, sizeof(buf));
297 
298 	exit_minibuffer();
299 	load_url_in_tab(tab, buf, NULL, LU_MODE_NOCACHE);
300 }
301 
302 void
303 ir_select_gopher(void)
304 {
305 	minibuffer_hist_save_entry();
306 	gopher_send_search_req(current_tab, minibuffer_compl_text());
307 	exit_minibuffer();
308 }
309 
310 void
311 lu_select(void)
312 {
313 	char url[GEMINI_URL_LEN+1];
314 
315 	minibuffer_hist_save_entry();
316 	humanify_url(minibuffer_compl_text(), url, sizeof(url));
317 	exit_minibuffer();
318 	load_url_in_tab(current_tab, url, NULL, LU_MODE_NOCACHE);
319 }
320 
321 void
322 bp_select(void)
323 {
324 	exit_minibuffer();
325 	if (*ministate.buf != '\0')
326 		add_to_bookmarks(ministate.buf);
327 	else
328 		message("Abort.");
329 }
330 
331 void
332 ts_select(void)
333 {
334 	struct tab	*tab;
335 
336 	if ((tab = minibuffer_metadata()) == NULL) {
337 		message("No tab selected");
338 		return;
339 	}
340 
341 	exit_minibuffer();
342 	switch_to_tab(tab);
343 }
344 
345 void
346 ls_select(void)
347 {
348 	struct line	*l;
349 
350 	if ((l = minibuffer_metadata()) == NULL) {
351 		message("No link selected");
352 		return;
353 	}
354 
355 	exit_minibuffer();
356 	load_url_in_tab(current_tab, l->alt, NULL, LU_MODE_NOCACHE);
357 }
358 
359 static inline void
360 jump_to_line(struct line *l)
361 {
362 	struct vline	*vl;
363 	struct buffer	*buffer;
364 
365 	buffer = current_buffer();
366 
367 	TAILQ_FOREACH(vl, &buffer->head, vlines) {
368 		if (vl->parent == l)
369 			break;
370 	}
371 
372 	if (vl == NULL)
373 		message("Ops, %s error!  Please report to %s",
374 		    __func__, PACKAGE_BUGREPORT);
375 	else {
376 		buffer->top_line = vl;
377 		buffer->current_line = vl;
378 	}
379 }
380 
381 void
382 swiper_select(void)
383 {
384 	struct line	*l;
385 
386 	if ((l = minibuffer_metadata()) == NULL) {
387 		message("No line selected");
388 		return;
389 	}
390 
391 	exit_minibuffer();
392 	jump_to_line(l);
393 }
394 
395 void
396 toc_select(void)
397 {
398 	struct line	*l;
399 
400 	if ((l = minibuffer_metadata()) == NULL) {
401 		message("No line selected");
402 		return;
403 	}
404 
405 	exit_minibuffer();
406 	jump_to_line(l);
407 }
408 
409 static void
410 yornp_self_insert(void)
411 {
412 	if (thiskey.key != 'y' && thiskey.key != 'n') {
413 		message("Please answer y or n");
414 		return;
415 	}
416 
417 	exit_minibuffer();
418 	yornp_cb(thiskey.key == 'y', yornp_data);
419 }
420 
421 static void
422 yornp_abort(void)
423 {
424 	exit_minibuffer();
425 	yornp_cb(0, yornp_data);
426 }
427 
428 static void
429 read_self_insert(void)
430 {
431 	if (thiskey.meta || !unicode_isgraph(thiskey.cp)) {
432 		global_key_unbound();
433 		return;
434 	}
435 
436 	minibuffer_self_insert();
437 }
438 
439 static void
440 read_abort(void)
441 {
442 	exit_minibuffer();
443 	read_cb(NULL, read_data);
444 }
445 
446 static void
447 read_select(void)
448 {
449 	exit_minibuffer();
450 	minibuffer_hist_save_entry();
451 	read_cb(ministate.buf, read_data);
452 }
453 
454 /*
455  * TODO: we should collect this asynchronously...
456  */
457 static inline void
458 populate_compl_buffer(complfn *fn, void *data)
459 {
460 	const char	*s, *descr;
461 	struct line	*l;
462 	struct buffer	*b;
463 	struct parser	*p;
464 	void		*linedata;
465 
466 	b = &ministate.compl.buffer;
467 	p = &b->page;
468 
469 	linedata = NULL;
470 	descr = NULL;
471 	while ((s = fn(&data, &linedata, &descr)) != NULL) {
472 		if ((l = calloc(1, sizeof(*l))) == NULL)
473 			abort();
474 
475 		l->type = LINE_COMPL;
476 		l->data = linedata;
477 		l->alt = (char*)descr;
478 		if ((l->line = strdup(s)) == NULL)
479 			abort();
480 
481 		TAILQ_INSERT_TAIL(&p->head, l, lines);
482 
483 		linedata = NULL;
484 		descr = NULL;
485 	}
486 
487 	if ((l = TAILQ_FIRST(&p->head)) != NULL &&
488 	    ministate.compl.must_select)
489 		l->type = LINE_COMPL_CURRENT;
490 }
491 
492 void
493 enter_minibuffer(void (*self_insert_fn)(void), void (*donefn)(void),
494     void (*abortfn)(void), struct histhead *hist,
495     complfn *complfn, void *compldata, int must_select)
496 {
497 	in_minibuffer = complfn == NULL ? MB_READ : MB_COMPREAD;
498 	if (in_minibuffer == MB_COMPREAD) {
499 		ui_schedule_redraw();
500 
501 		ministate.compl.fn = complfn;
502 		ministate.compl.data = compldata;
503 		ministate.compl.must_select = must_select;
504 		populate_compl_buffer(complfn, compldata);
505 	}
506 
507 	base_map = &minibuffer_map;
508 	current_map = &minibuffer_map;
509 
510 	base_map->unhandled_input = self_insert_fn;
511 
512 	ministate.donefn = donefn;
513 	ministate.abortfn = abortfn;
514 	memset(ministate.buf, 0, sizeof(ministate.buf));
515 	ministate.buffer.current_line = &ministate.vline;
516 	ministate.buffer.current_line->line = ministate.buf;
517 	ministate.buffer.cpoff = 0;
518 	strlcpy(ministate.buf, "", sizeof(ministate.prompt));
519 
520 	ministate.history = hist;
521 	ministate.hist_cur = NULL;
522 	ministate.hist_off = 0;
523 }
524 
525 void
526 exit_minibuffer(void)
527 {
528 	if (in_minibuffer == MB_COMPREAD) {
529 		erase_buffer(&ministate.compl.buffer);
530 		ui_schedule_redraw();
531 	}
532 
533 	in_minibuffer = 0;
534 	base_map = &global_map;
535 	current_map = &global_map;
536 }
537 
538 void
539 yornp(const char *prompt, void (*fn)(int, struct tab*),
540     struct tab *data)
541 {
542 	size_t len;
543 
544 	if (in_minibuffer) {
545 		fn(0, data);
546 		return;
547 	}
548 
549 	yornp_cb = fn;
550 	yornp_data = data;
551 	enter_minibuffer(yornp_self_insert, yornp_self_insert,
552 	    yornp_abort, NULL, NULL, NULL, 0);
553 
554 	len = sizeof(ministate.prompt);
555 	strlcpy(ministate.prompt, prompt, len);
556 	strlcat(ministate.prompt, " (y or n) ", len);
557 }
558 
559 void
560 minibuffer_read(const char *prompt, void (*fn)(const char *, struct tab *),
561     struct tab *data)
562 {
563 	size_t len;
564 
565 	if (in_minibuffer)
566 		return;
567 
568 	read_cb = fn;
569 	read_data = data;
570 	enter_minibuffer(read_self_insert, read_select, read_abort,
571 	    &read_history, NULL, NULL, 0);
572 
573 	len = sizeof(ministate.prompt);
574 	strlcpy(ministate.prompt, prompt, len);
575 	strlcat(ministate.prompt, ": ", len);
576 }
577 
578 static void
579 handle_clear_echoarea(int fd, short ev, void *d)
580 {
581 	free(ministate.curmesg);
582 	ministate.curmesg = NULL;
583 
584 	ui_after_message_hook();
585 }
586 
587 void
588 vmessage(const char *fmt, va_list ap)
589 {
590 	if (evtimer_pending(&clechoev, NULL))
591 		evtimer_del(&clechoev);
592 
593 	free(ministate.curmesg);
594 	ministate.curmesg = NULL;
595 
596 	if (fmt != NULL) {
597 		evtimer_set(&clechoev, handle_clear_echoarea, NULL);
598 		evtimer_add(&clechoev, &clechoev_timer);
599 
600 		/* TODO: what to do if the allocation fails here? */
601 		if (vasprintf(&ministate.curmesg, fmt, ap) == -1)
602 			ministate.curmesg = NULL;
603 	}
604 
605 	ui_after_message_hook();
606 }
607 
608 void
609 message(const char *fmt, ...)
610 {
611 	va_list ap;
612 
613 	va_start(ap, fmt);
614 	vmessage(fmt, ap);
615 	va_end(ap);
616 }
617 
618 void
619 minibuffer_init(void)
620 {
621 	TAILQ_INIT(&eecmd_history.head);
622 	TAILQ_INIT(&ir_history.head);
623 	TAILQ_INIT(&lu_history.head);
624 	TAILQ_INIT(&read_history.head);
625 
626 	TAILQ_INIT(&ministate.compl.buffer.head);
627 	TAILQ_INIT(&ministate.compl.buffer.page.head);
628 
629 	ministate.line.type = LINE_TEXT;
630 	ministate.vline.parent = &ministate.line;
631 	ministate.buffer.page.name = "*minibuffer*";
632 	ministate.buffer.current_line = &ministate.vline;
633 
634 	evtimer_set(&clechoev, handle_clear_echoarea, NULL);
635 }